I want to know the difference between digital tuning radio, digital demodulation radio and DSP digital demodulation radio. By the way, what are their advantages and disadvantages? Thank you:-)

1. Digital tuning uses PLL phase-locked technology to search and lock the frequency, which has the advantages of accurate frequency and no frequency drift. Traditional tuning adopts variable capacitance or variable inductance, and its main disadvantage is unstable frequency. Modern digital tuned radios almost always display frequency directly with numbers, while analog tuned radios used to display frequency mainly by hands and scales.

2.DSP digital demodulation-DSP originally meant digital signal processing. When used in radio, it refers to the method of software radio processing broadcast waves and demodulating sounds; The so-called DSP chip is to solidify all software radio algorithms used for signal processing into a semiconductor chip, including the following processes:

-Analog high-frequency radio waves are converted into digital signals in the form of 01010101010/010/by an "analog-to-digital" converter,

-Perform a series of "beauty" treatments on these digital signals.

Finally, these digital signals are restored to sound by some corresponding mathematical algorithms and a "D/A converter".

DSP digital demodulation radio is a technology that has only been applied in the radio field in recent years. Due to the characteristics and cost of the technology itself, the receiving effect of DSP digital demodulation radio station is not as good as that of traditional PLL phase-locked technology except FM reception.